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"MMGI') W. N. BARRETT.

STEAM GENERATOR.

Patented Mar. 22, 1892.

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WVILLIAM N. BARRETT, OF MEADVILLE, PENNSYLVANIA, ASSIGNOR TO THEUNIVERSAL -FUEL COMPANY.

STEAM-GENERATOR.

SPECIFICATION forming part of Letters Patent No. 471,333, dated March22, 1892.

l Application filed May 6, 1891. Serial No. 391,73 7. (No model.)

To all whom it may concern.-

Beit known that WILLIAM N. BARRETT, a citizen of the United States,residing at Meadville, in the county of Crawford and State ofPennsylvania, have invented certain new and useful Improvements inSteam-Generators; and I do hereby declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

This invention relates to steam-generators; and it consists in certainimprovements in the construction thereof, as will be hereinafter fullyset forth, and pointed out in the subjoined claims.

The invention is illustrated in the accompanying drawings, as follows:

Figure l is a longitudinal vertical sectional view of my device, andFig. 2 is a transverse section on the line :r in Fig. l.

The first part of the invention relates to the boiler and means foradmitting water thereto and conveying the steam therefrom, and thesecond part of the invention relates to means for heating the boiler.

The construction and operation of the device is as follows, referencebeing had to the drawings and the letters of reference marked thereon.

The boiler consists of two chambers B and B', of whichB is thesteam-generating chamber, and B the steam-drum or steam-space. Theboiler is formed of the castings b and b', which are bolted together, asshown, the casting b forming the steam-generating chamber B and b thesteam-space B', which is above the generating-chamber. The castingb isin the form of a boX and may be of such size and form as is desired, andthe base of the upper casting b serves as a complete cover to the lowerchamber, while the upper chamber is much smaller than the lower chamber.

In the chamber B is a water-pan O, which is suspended by the bail-bar cand a link c from a lever D d in the upper chamber, which lever is journaled in afulcrum-block E which is swiveled at the upper end of ascrew-post E. The short end d of the lever D cl is at right angles tothe long end D, and the stem f of a valve F sets against the side of theshort end d. By raising or lowering the lever D cl by turning thescrew-post E the end of the valvestem f is brought near to or away fromthe plane of the fulcrum of the lever, and thus the pressure to beexerted by the valve-stem f against the lever D d can he properlyadjusted, so as to effect the lifting up of the pan C when empty orpartially empty, as desired. The valve F when seated closes the opening6o through the nipple F, which is connected with a water-supply pipe G.The pressure of the water from the pipe G against the valve F will driveit away from its seat whenever the weight of the pan C and its contentsis in'- 65 sufficient to hold the valve against its seat. When the valveis pressed off its seat, water v will liow past it and enter the chamberB and flow down into the pan C in the chamber B, and as soon as enoughwater is in the pan to 7o give it sufficient weight to hold the valve Fagainst its seat the water will of course cease to ow.

The boiler B B is suspended in any Way desirable over a fire, and watercontained A within the pan will be converted into steam and fill thechamber B and from thence flow off through the pipe H. As soon as thewater has been sufficiently evaporated to make the pan light enough tobe lifted by the pressure 8o of the water acting on the valve F morewater will flow in and take the place of that which has been evaporated.So it will be seen that a supply of wateris automaticallylet into thepan as fast as it is required and no faster.

Such a generator as. this just described is particularly adapted forsupplying low-pressure steam for heating purposes; but I do not intendto be limited to the use of the device for any particular purpose.

The generators can be built for large or small capacity and can be usedin connection with any form of burner or furnace. In Fig. l I show it incombination with a hydrocarbon-burner and so applied as to furnish the95 steam which is used in the burner. The construction and operation ofthe device in this respect are as follows: J is the outer shell of aninjector, and K is the inner pipe, and L is the regulating and shut-offvalve. These fearoo tures are common in hydrocarbon-burners and may bevaried to suit the builder. In fact,

any ordinary hydrocarbon atoniizing burner maybe used. The pipe II'connects with the steam-pipe II and the pipe M connects with the oil orgasoline or, if used, the gas supply. A' is a cone through which theatmospheric air is admitted to the flame, and A is the oilpan used tostart the device in operation by burning oil or gasoline in it, as iscommon in this class of burners.

The operation of a hydrocarbon burner is well understood and need not behere described; but it will be understood that the flame from the burnerJ K L will heat the boiler B B', and the steam generated therein will tothe extent required be used in the said burner, and the residue willpass oit through the pipe H for use as desired.

I am aware that it is not new to generate within the flame of ahydrocarbon-burner the steam which is used in said burner, and shall notbroadly claim that feature of my device.

l. In a steam-generator, the combination of a boiler, a water-pancontained within said boiler, which holds the water to be converted intosteam, a scale-beam lever which will raise said pan, when the watercontained therein falls below a desired amount, through the action of acounteracting force applied to said scale-beam, a water-supply pipeentering said boiler in position to supply Water to said pan, and avalve closing said watersupply pipe, which is operated from said leverso as to open said valve when the water-pan is lifted by said lever.

2. In a steamgenerator, the combination of a boiler having agenerating-chamber and a steam-space, a 4water-pau vertically movable insaid generating-chamber, and a lever within the steam -space, which isconnected at one end with said pan, so as to vertically move the same,and at the other end with the stem of a valve which closes awater-supply pipe, so as to be moved by said valve when it is forced offits scat, whereby the supply of water to the water-pan is automaticallyregnlated through the counteraction upon said lever of the weight ofsaid pan and its contents and the pressure of the water-supply.

3. In a steain-generator, the combination of a generating-chamber, asteam-space, a water-supply pipe, a valve in said water-supply pipe,which opens inwardly, a lever acting against said valve to close itagainst the pressure of the water-supply, and a waterpan which holds thewater to be converted into steam and receives its supply from saidsupply-pipe, which is connected with said lever in a mannersubstantially as set forth, whereby the weight of said pan and itscontents rcsists the pressure of the water-supply upon said valve.

4. In a steam-generator, the combination of a boiler having the chambersB and B' arranged one below the other, a water-pan C within the chamberB, a water-supply pipe entering the chamber B', an inwardly-openingvalve F', closing said pipe, and a scale-beam lever D (l within saidchamber B', which is connected at one end with the water-pan, so as tomove the same vertically, and at the other end with the stem of saidvalve I1" so as to be moved by "said valve when it is forced ott of itsseat by the inwardly-acting pressure of the water-supply.

5. In a steam-generator, the combination of the generating-chamber B,the steam-space B' above said chamber B, the Water-pan C in said chamberB, the lever D d in said steamspace, the vertically-moving fulcrum forsaid lever, the valve stem j' of the Water -supply valve F in contactwith the arm d ot' said lever, and the connection c, connecting saidWaterpan to the arm D of said lever.

In testimony whereof I aiiix my signature in presence of two witnesses.

XVM. N. BARRETT.

Witnesses:

JNO. K. IIALLooK, WM. I). IIAvns.

